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Curious Cheetah

Range

Background

This puzzle appears to be a Nikoli original appearing in 1991.

Puzzle and Goal

An unsolved puzzle consists of a rectangular grid with numbers in some of the cells.
The goal is to color in some of the cells to satisfy the clues.
Range initial statespacerRange solution

Rules

The solved grid must satisfy the following conditions:

Other Names

Blackberrier Jam; Kurodoko; Kuromasu

Playable Online